We report measurements of the flux flow instability velocity in 8 nm thin superconducting NbRe microstrips. In particular, a change in vortex motion after the film has been lightly oxidised is observed. We propose a possible mechanism according to which pinning is caused by domain walls where the superconducting properties are discontinuous and support our claim by a toy-model time-dependent Ginzburg-Landau simulation. Since our model is very general and applies to any type-II superconductor, we expect similar effects on other air-sensitive ploycrystalline thin film superconductors.
Vortex Motion Study of Oxidised Superconducting NbRe Microstrips / Chen, X., Cirillo, C., Ejrnaes, M., Parlato, L., Pepe, G.P., Attanasio, C., Van Der Molen, S.J., De Dood, M.J.A.. - In: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY. - ISSN 1051-8223. - 34:3(2024), pp. 1-5. [10.1109/TASC.2023.3340641]
Vortex Motion Study of Oxidised Superconducting NbRe Microstrips
Parlato L.;Pepe G. P.;
2024
Abstract
We report measurements of the flux flow instability velocity in 8 nm thin superconducting NbRe microstrips. In particular, a change in vortex motion after the film has been lightly oxidised is observed. We propose a possible mechanism according to which pinning is caused by domain walls where the superconducting properties are discontinuous and support our claim by a toy-model time-dependent Ginzburg-Landau simulation. Since our model is very general and applies to any type-II superconductor, we expect similar effects on other air-sensitive ploycrystalline thin film superconductors.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
